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Stockholders' Equity (Details 6) - Consultant Plan [Member] - shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Reserved but unissued shares under the Plan, beginning of year 92,130 65,608
Increases in the number of authorized shares under the Consultant Plan 1,503 31,522
Stock grants (10,000) (5,000)
Reserved but unissued shares under the Plan, end of year 83,633 92,130